How To Fix /SAPAPO/DP_EVENT151 - Recursive nesting is not allowed, the hierarchy of &1 already contains &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/DP_EVENT -

• Message number: 151

• Message text: Recursive nesting is not allowed, the hierarchy of &1 already contains &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/DP_EVENT151 - Recursive nesting is not allowed, the hierarchy of &1 already contains &2 ?

  The SAP error message /SAPAPO/DP_EVENT151 indicates that there is an issue with the hierarchical structure of a planning object in SAP Advanced Planning and Optimization (APO). Specifically, the error states that recursive nesting is not allowed, meaning that an object is trying to reference itself or is already part of a hierarchy that includes itself, which is not permitted.
  Cause:
  
  Recursive Hierarchy: The most common cause of this error is that the object (e.g., a characteristic or a planning object) is being added to a hierarchy that already contains it, either directly or indirectly.
  Incorrect Configuration: There may be a misconfiguration in the way the hierarchies are set up in the system, leading to circular references.
  Data Integrity Issues: There could be issues with the data integrity in the master data, where the relationships between objects are not correctly defined.
  
  Solution:
  
  Check Hierarchy Structure: Review the hierarchy structure for the object mentioned in the error message. Ensure that the object is not already part of the hierarchy you are trying to add it to.
  Modify Hierarchy: If you find that the object is indeed part of the hierarchy, you will need to modify the hierarchy to remove the recursive reference. This may involve restructuring the hierarchy or removing the object from the hierarchy before attempting to add it again.
  Data Validation: Validate the master data to ensure that there are no inconsistencies or errors in the relationships between objects. This may involve checking the configuration of characteristics and their assignments.
  Use Transaction Codes: Utilize relevant transaction codes (like /SAPAPO/DP for demand planning) to analyze and modify the hierarchy settings.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on managing hierarchies in APO.
  
  Related Information:
  
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that address known issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Testing: After making changes, conduct thorough testing to ensure that the hierarchy functions as expected without causing further errors.
  
  By following these steps, you should be able to resolve the error and ensure that your hierarchy is correctly configured in SAP APO.